MicroLinks VT300 - user manual - Manual (Page 59)

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Copyright ©2008-2012 MicroLinks Technology Corp.
Fig 5-65 2 Points Circle Measurement
(3) 3 Points Circle: See an arc or a circle shows on the observation only and need
measure the circle, it can use . Firstly choose Fig.5-63 Scale information
setting dialog. To point any point on the edge of an arc, draw a line to second
point, then drag the line to the third point on the same arc, to automatically
calculate a correct circle. The said 3 points on the arc to be necessary a triangle.
See Fig 5-66, the figure can be measure as 2 Point Circle. 1
st
circle:
Circumferences C=2.409mm, 2
nd
circle Area A=0.450 mm
2
, 3
rd
circle:
R=0.727mm, 4
th
circle: D=1.480mm.
Fig 5-66 3 Points Circle
(4) Oval: Measure an oval circle and use . Firstly choose Fig.5-67 Scale
information setting dialog. To point any dot on an oval, pressing the left mouse
button, and drag to fit the oval on an observation object. Same methods as
Circle to be measured for 2 Points Circle and 3 Points Circle, 1
st
oval C=6.703m,
2
nd
oval A=2.947mm
2
, 3
rd
oval: lR=1.328mm, sR=0.714mm, 4
th
oval
lD=2.826mm, sD=1.428mm.